The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Apr. 18, 2017

Filed:

Nov. 09, 2010
Applicants:

Yasutake Hirota, Chuo-ku, JP;

Kenichi Katsuma, Chuo-ku, JP;

Masatake Hirooka, Chuo-ku, JP;

Takayuki Hachida, Chuo-ku, JP;

Inventors:

Yasutake Hirota, Chuo-ku, JP;

Kenichi Katsuma, Chuo-ku, JP;

Masatake Hirooka, Chuo-ku, JP;

Takayuki Hachida, Chuo-ku, JP;

Assignee:

Ferrotec Corporation, Chuo-ku, JP;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B82Y 25/00 (2011.01); H01F 1/00 (2006.01); B22F 1/00 (2006.01); B82Y 30/00 (2011.01); H01F 3/08 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0018 (2013.01); B22F 1/0018 (2013.01); B82Y 25/00 (2013.01); B82Y 30/00 (2013.01); H01F 1/0054 (2013.01); H01F 1/0063 (2013.01); H01F 3/08 (2013.01);
Abstract

A magnetic member includes a plurality of superparamagnetic particles held by the magnetic member. Each of the plurality of superparamagnetic particles is formed with a particle size which is set at least such that a Neel relaxation time τn in the each of the superparamagnetic particles becomes shorter than a cycle P of an alternating current magnetic field applied to the magnetic member (τn<P) when the magnetic member is used as an electronic component.


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